Vent system for stylographic pen

ABSTRACT

STYLOGRAPHIC DRAFTING OR WRITING PEN OF THE TYPE HAVING AN INK RESERVOIR WITH A VENTING HOLE IN THE TOP OF SAID RESERVOIR AND A CLEANING WIRE RECIPORCABLY EXTENSIBLE THROUGH A TUBULAR WRITING POINT, PARTICULARLY A VENT STEM WITH VENT VALVE PORTION PROTRUDING THROUGH SAID VENTING HOLE SO AS TO PROVIDE A VENT AND IMPROVED INK CARRYING OFF SYSTEM, INSIDE THE RESERVOIR, BENEATH SAID VENTING HOLE.

2 Sheets-Sheet 1 Filed May 2;, 1969 Feb. 9, 1971 E. BOK

VENT SYSTEM FOR STYLOGRAPHIC PEN 2 Sheets-Shemv 9 Filed May 21, 1969 "I i: W/ FIMFIQ 3,561,880 Patented Feb. 9, 1971 3,561,880 VENT SYSTEM FOR STYLOGRAPHIC PEN Edward Bok, 819 Tucker Road, New Bedford, Mass. 02747 Filed May 21, 1969, Ser. No. 826,361 Int. Cl. B43k 1/06, 1/10 U.S. Cl. 401-258 14 Claims ABSTRACT OF THE DISCLOSURE Stylographic drafting or writing pen of the type having anink reservoir with a venting hole in the top of said reservoir and a cleaning wire reciprocably extensible through a tubular writing point, particularly a vent stem with vent valve portion protruding through said venting hole so as to provide a vent and improved ink carrying off system, inside the reservoir, beneath said venting hole.

CROSS REFERENCES TO RELATED APPLICATIONS An improvement upon applicants U.S. pat. application Ser. No. 770,251, filed Oct. 24, 1968 entitled Drafting Pen With Cleaning Wire.

BACKGROUND OF THE INVENTION A principal shortcoming in contemporary stylographic writing pens is dried ink clogging of the reservoir vent opening. Normally, the vent opening connects the inside of the inkireservoir with the outer atmosphere. Caking of the dried ink in or adjacent the vent opening can totally obstruct the passage of air through the vent opening.

SUMMARY OF THE INVENTION According to the present invention, the pen barrel defines an ink reservoir. The necessary regulation of air admitted to the reservoir is controlled by a vent stem which extends through a vent hole and into the reservoir. Venting is controlled by a knob extending through a slot in the side of the pen barrel. An ink carrying off system is located in the top of the ink reservoir, which system corresponds to the venting hole. The reciprocably movable vent stem is provided with side elements whereby to keep the ink carrying off system free of clogged ink.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a fragmentary vertical sectional view, showing a stylographic writing pen, according to the invention, with improved ink carrying off means beneath the vent opening of the ink reservoir;

FIG. 2 is a transverse sectional view of the writing pen taken along section line 22 of FIG. 1;

FIG. 3 is a transverse sectional view of the writing pen taken along section lines 33 of FIG. 1;

FIG. 4 is a transverse sectional view of the writing pen taken along section line 44 of FIG. 1;

FIG. 5 is a fragmentary vertical sectional view of the top portion of the ink reservoir, according to FIG. 1, with vent stem brought upward to its top position;

FIG. 6 is an enlarged vertical sectional view of a stylo graphic writing pen, according to the invention with modified ink carrying off means beneath the vent opening of the ink reservoir;

FIG. 7 is a transverse sectional view of the writing pen taken along section line 77 of FIG. 6;

FIG. 8 is a transverse sectional view of the writing pen taken along section line 88 of FIG. 6;

FIG. 9 is a fragmentary vertical sectional view of the top portion of the ink reservoir according to FIG. 6, with the vent stem brought upward to its top position;

FIG. 10 is a fragmentary vertical sectional view of the top portion of the ink reservoir of a stylographic writting pen, according to the invention with modified ink carrying off means beneath the vent opening of the ink reservoir;

FIG. 11 is a fragmentary transverse sectional view of the vent stem as is used in writing pen according to FIG. 10;

DESCRIPTION OF THE PREFERRED EMBODIMENTS According to ,FIG. 1, pen 10 consists of vent housing 12, writing nib 14, pen tip 16 with cleaning wire 18 extending through its ink passageway 20 and top cap 22. Ink remover 24 is, by means of pin 26, connected to vent stem 28, which vent stem protrudes through vent opening 30 in vent housing 12, see FIG. 2, and may connect integrally with manually operated knob 32, which knob transversely protrudes through longitudinal slot 34 in side wall 36 of vent housing 12. Beneath vent opening 30, the housing 12 has a vent chamber 36 in which chamber ink remover 24 is longiutdinally movable (see also FIG. 3).

Ink, which may be collected in chamber 36, during a lay down of the pen 10, is, while in writing position of the pen, removed from at least the upper part of said chamher by means of the capillary downward flow of this ink.

The remover 24 mainly serves to keep the vent chamber 36 free of clogged ink, thereby securing proper ink carrying off from the upper part of this chamber, near vent opening 30, as is required for a proper venting of ink reservoir 38. As indicated, chamber side wall 40 may be shorter.

Furthermore, within the scope of invention chamber 36 may be formed of side wall 42, side walls 44 and 46 only having small widths and with vent stem 28 in the form indicated in FIG. 4.

As indicated in FIG. 6 as a modification, chamber 36' is the top of the ink reservoir 38. Extensions 48, 50, 52 and 54 provide guidance for the vent stem 28' via ink remover 24' and also provide ink carrying oif channels 56 and 58 which said channels are connected to chamber 36, see also FIGS. 7 and 8. The FIG. 9 vent stem 28' is shown in its top position with the ink remover 24 in chamber 36.

In FIG. 10, ink remover 24" is part of the vent stem 28" as a modification within the scope of the invention. FIG. 11 shows the attachment of cleaning wire 18" to the ink remover 24".

In FIG. 1 lower compression spring extensions 60 and 62 are shown. Within the scope of the invention both extensions can be omitted or disposed in another position within the pen 10.

I claim:

1. Stylographic pen including vent housing, ink reservoir, vent opening in top of ink reservoir, vent stem reciprocable in the vent housing, protruding through vent opening into ink reservoir, pen tip with ink passage way, a cleaning wire, movable in the ink passageway of the pen tip;

(A) in the ink reservoir an ink carry off system which coacts with said vent, and

(B) means retained in the ink reservoir to keep said ink carrying off system free of clogged ink.

2. Stylographic pen as in claim 1, wherein said ink carrying otf system comprises an axial chamber.

3. Stylographic pen as in claim 2, in which said vent stem includes an ink remover and in which the ink remover is movable in said chamber to keep said chamber free of clogged ink.

4. Stylographic pen as in claim 3, in which said chamber comprises a dependent extension of the vent housing, per se.

5. Stylographic pen as in claim 4, wherein said chamber is of such a length that in lowest movable position of the vent stem at least in part is guided.

6. Stylographic pen as in claim 5, wherein said chamber comprises the top of the ink reservoir.

7. Stylographic pen as in claim 6, in which said chamber extends longitudinally from said vent opening in at least one direction.

8. Stylographic pen as in claim 7, said chamber extending from said vent opening in two opposite directions.

9. Stylographic pen as in claim 8, in which a manually operable knob is connected to said vent stem.

10. Stylographic pen as in claim 9, said vent housing having a longitudinal slot in its side and said vent stem having a knob laterally extending through said slot outside of said pen.

11. Stylographic pen as in claim 10, wherein upon setting a balanced position of the vent stern it is open.

12. Stylographic pen as in claim 11, including lower and upper compression spring extensions, maintaining balanced rest contact with the vent stem.

13. Stylographic-pen as in claim 12, said cleaning wire bein gattached to said ink remover.

14. Stylographic pen as in claim 13, said ink remover being part of the vent stem.

References Cited UNITED STATES PATENTS 878,914 2/ 1908 Ullrich 401-260 FOREIGN PATENTS 752,980 7/ 1956 Great Britain 401'--258 597,184- 8/1959 Italy 401-259 LAWRENCE CHARLES, Primary Examiner 

